<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        input{
            outline: 0;
        }

        /* input:enabled{ */
        /* input:disabled{ */
        /* input:read-only{ */
        input:focus{
            /* background: pink; */
        }

        input:checked{
            margin-right: 20px;
        }

        div::selection{
            color:red;
        }


    </style>
</head>
<body>
    姓名：<input type="text"> <br>
    年龄：<input type="text" value="aaa" disabled> <br>
    邮箱：<input type="text" value="bbb" readonly> <br>
    性别：<input type="radio" name="sex">男
          <input type="radio" name="sex">女

    <div>
        aaaaabbbbbbbbbbbbccccccccccc
    </div>
</body>
</html>